Emergency mechanism for internal-combustion engines.



W. E. VER PLANCK. EMERGENCY MECHANISNI FR lNTERNAL COMBUSTION ENGINES.

APPLICATION man 1LYz4, 1914.

Patented Dec. 28, 1915.

3, SHEETS- SHEEI l.

W. E. VER PLANCK.

EMERGENCY MECHANISM FOR INTERNAL CONBUSTION ENGINES.

APPLICATION HLED JULY 241v914. y

Patented Dec. 28, 1910.

3 SHEETS-SHEET 2.

Witness es:

W. E. VER PLANCK.

EMERGENCY MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED IuLY 24,1914.

SHEET 3.

Patented Dec. 28, 1915.

3 SHEETS- Im/e ntor- I/I/ILLiam EI/eI-PLancI( l w 4 :NIIIIII I C IIIII I YN II II I I I l IIIIII III II II I .IIII :III `HHII I I I II ieri WVJILLIAM EVERETT VER PLANCK, OlE ERIE, PENNSYLVANIA,

ASSIGNOR T GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.'

EMERGENCY MECHANISM FOR INTERNAIa-COMBUSTION ENGINES.

Specification of Letters Patent.

i rate-atea nee. ae., ieia.

Application led July 24, 1914. Serial No. 852,918.

Pennsylvania, have invented certain new and useful lmprovements in Emergencyv Mechanism i for lnternal-Combustion Engines, of whichothe following is a specification.

io 'lhis invention relates to internal combustion engines, and especially those of the highcompression type.

lts object is to provide such an engine with Aa reliable, lsimple and easily manipulated mechanismfor stopping the machine in case it 'acquires abnormally high speed. ln engines of this type, each cylinder is supplied with liquidfuel by a pump. 1 provide the pump with a bypass controlled by a.

valve, 'and arrange operative connections between--the valve and an emergency governor on the main shaft, so that said governor will open the bypass and stop the supply of fuel to the engine when its speed exceeds a predetermined maximum.

rllhe preferred construction of thev mechanism and its features of novelty will appear from. the following detailed description "takerfl in connection with the accompanying drawings, in which v 'lFigurel isa yfront elevation of a two-cylinder engine Fig. 2 is a perspective viewv of the tripping shaft and its triggers. Fig. 3 is a section of t5 one of thefuel pumps and its by-pass. Fig. 4 isa sectional elevation of the pumps and the. tripping ,mechanism Eig. is atop plan view of what is shown in, Fig. 4. Fig. 6 shows the emergency .governor and the to tripping shaft and arm.' Fig. 'shows-the pump-actuating mechanism in .its relation to the emergency governor. Fig. 8 shows the action of the emergency governor upon the tripping arm. FigwQ shows the `normal at position of thetrigger and plungerand the re-setting handle for one of. the bypass valves, and Fig. 10 shows the same partsA tripped.

The drawings show a high compression internal combustion` engine having two cyl` f inders, but it is evident that the number of cylinders is immateria Each cylinder 1 is supplied with liquid fuel through a pipe2 connected with a pump 3, whose plunger l is actuated by a lever 5 fulcrumed on an ecembodying myy improvements centric 6 and oscillated by an eccentric 7 on the `main shaft 8. The pump delivers through two springA check .valves 9, l0 arranged in series in a casing 11. A bypass 12 leads from a point on the casing between the two valves and communicates with the chamber 13 from which the pumpvtakes its supply of fuel. A valve '14 normally closes l the bypass, being held to its seat by la spring 15 engaging 'a collar on its stem 16. The upper end ofthe stem projects above the frame 17 towhich the pump lis fastened. Axially in line with this valve stem is a plunger 18 .mounted to move longitudinally in a guide 19. A spring 20 urges the plunger inwardly and is conveniently housed in the tubular outer portion' of said plunger, with its end abutting against a screw plug 21 `which closes the outer end of the guide. The plunger is normally retained in its retracted position out of contact with the valve stem 16, andwith the spring 20 under compression, by means which can be released by the emergency governor. rlhe preferred form of a releasing mechanism is that shown inl the drawings, in which a trigger 22 having a hub 23 rotatable on a tripping shaft 24: engages a 4shoulder 25 on the plunger 18 just below the guide 19. A tension spring 26 at tached to the trigger and to an element hereinafter mentioned keeps the triggerin engaging position.

'lhe tripping shaft 24 is journaled in suitable bearings 27 in 'the rear of the pum-ps and carries a tripping arm' 28 which extends into proximity to the emergency governor 2g mounted on-thexmain shaft. This governor may be of any desired` construction, but it must comprise a pivoted' member 30 which will fly out whenthe shaft attains an abnormally high speed and strike the end of nthe tripping arm 28. When thus moved, the

arm rocks the tripping shaft 24, and' by means of somewhat loosely interlocking teeth 31 on said shaft and the hub 23 of the trigger, the latter is -rocked away, from the shoulder 25, thereby tripping the plunger 18 and allowing its spring to thrust it withy a sudden hammer blow, against the stem 16 .of the bypass valve, and thereby open the byass.

The end of the tripping arm 28 is normally held adjacent to the emergency governor by-.a spring 32, but if this spring were allowed to return the arm to its normal posi- 1W .20 34 on the plunger 35, vas shown in Fig. 6.'

armwould receive a rain of blows. so long as the speed of the engine remained excessive.

I cept that it has v o prevent this, the arm 28 has a' trigger 33 preferably integral therewith,` and normallyen'gagedl by a shoulder 34 on a spring plunger 35, similar to the plunger 18, exahandle 36 extending up through -the annular screw plug 37. Whenthe arm 28.is tripped, as'shown in Fig. 8, the plunger 35 is released and vdrops upon a stop 38. The upper portion 39 of the plunger is of larger diameter than'that below the shoulder 34 and acts as a detent for the trigger ..33 which is preventedby said portion `39 from returning' to its normal position, lwhile the arm 28 is held out of the path of the revolving weight 30. To reset the arm 28, the handle is pulled up until the trigger; 33 can snap in under-the shoulder In order to reset the the bypass valve `close lever 40 is fulcrumed arm under lthe lower and its longer forked 42 on a rod`43 which extends through a suitable guide 44 inthe frontof the casing inclosing thetripping mechanism, and is plunger 1.8 and let again, a bell crank at 41 with lits short end ofI the plunger,

provided Awith a handle 45. The spring 26 longer arm of the `lever thefrod 43 'bears against 46 thereon. When drops on-the valve stem 16, its lower end lands also on the short arm ofthelever 40, asseen in Fi 10.

' '43 to the doted line position in this figure p pipe 2 and by-pass 12 j wasting the lair.

` -withth y, plunger.

.and the arm 28.

the lever will lift the-plunger until the triggercan snap in under the lshoulder 25, as

`shown in Fig. 9. The rod 43 can also be used to cutout the pump when necessary,"

by f pushing it in and thereby rocking trigger 22 out of Thev lost motion between the teeth 31 permitsthe trigger tobe rocked1 without disturbing the tripping shaft 24 .This movement'of the trlgger, as stated above, trips the plunger and lets it open the ybypass valve.- By arranging the by-p and'lO, I

the

protect the pump by-pass valve is opened, preventing such air from blowing down through; the di'scharge into the pump chamber and blowing the fuel out as lwell as `In accordance with the provisions of the patent statutes, have'described the principle of operation of my invention, together e apparatus which 1S now consider vto representthe best embodiment thereof;

but VI desire to havegit understood that the apparatus-shown is only illustrative, and

vbustlon engine the engine shaft,

armengaging a lpin .bustion engine pass around said pump, a valve controlling and the plunger 18 By pulling out the rod i engagement :with the ass 12 between the two dis .ping shaft and blast air when the bypass around that the invention can be carried out by other means.

What I claim as new and desire to secure by Letters Patent of vthe United States, is `1. The combination with an internal comhaving a fuel pump, of a bypass around said pump, a valve controlling said bypass, an.y emergency governor driven by the engine shaft, and a plunger adapted to be tripped by said governor and open said valve.

2. The combination with an internal combustion engine having a fuel pump, of a bypass around said pump, a valve controlling said bypass, a plunger adapted to open said valve, a trigger holding said plunger inoperative, an emergency governor driven by and operative connections between said governor and said. trigger. 3. lThe combination with an internal combustionengine having a fuel pump, of a bypass around said pump, a valve controlling said bypass and having a projecting stem, a spring plunger in line'4 with said stem and having-a shoulder, a trigger engaging said shoulder, an emergency governor driven by the engine shaft, and operative connections between said governor and said trigger.

l4. The combination with an internal oomhaving a fuel pump, of a bysaid bypass and havingv a projecting stem, a spring plunger in line with said stern andhaving a shoulder, a trigger engaging said shoulder, a' tripping shaft on which said trigger ismounted, an emergency lgovernor driven by the engine shaft, and means whereby said governor can rock `said trippping shaft.

5.. The combination with an internal combustion engine having a fuel pump, of a bypass around said pump, a valve controlling said bypass'and having a projecting stem, a-spring plunger in line with said stem and having-a shoulder, a trigger engaging said shoulder, atripping shaft on which said trigger is mounted, an emergency governor driven` by the engine shaft, and means whereby said'governor can rock said tripping shaft comprising an arm on the tripa spring urging it into the path of the governor.

6. The combination with an internal combustion engine having a v said pump, a valve controlling said bypass and havin a projecting stem, a spring plunger in line with said stem and having a shoulder, a trigger'engaging said shoulder, a tripping shaft on which said trigger is mounted an emergency governor driven by the engine shaft, means .whereby said governor can rock said trip-fl ping shaft, comprising an arm on the tripping shaft and a spring urging it into the path of the governor, and a detent for holdfuel pump, of a ing said arm out of said, path after it has been tripped.

7. The combination with an internal combustion engine having a fuel pump, of a bypass around said pump, a valve controlling said bypass and having a projecting stem, a spring plunger in line with said stem and having a shoulder, a trigger engaging said shoulder, a tripping shaft on which said trigger is mounted, an emergency governor driven by the engine shaft, means whereby said governor can rock said tripping shaft comprising an arm on the tripping shaft and a spring urging it into the path of the governor, and ing said arm out of said path after it has been tripped comprising a trigger on'the shaft,L and a spring plunger engaging the same and having its upper portion of larger diameter than its lower portion.

8. rlhe combination with an internal combustion engine having a fuel pump, of a bypass around said pump, a valve controlling said bypass and having a projecting stem, a spring plunger in line with said stem and having a shoulder, a tripping shaft, a trigger loosely mounted thereon and engaging said shoulder, loosely interlocking teeth on the shaft and trigger, a tripping arm secured to the shaft, an emergency governor for tripping said arm, and means for tripping said trigger independently of said arm.

9. The combination with an internal combustion engine having a fuel pump, of a bypass around said pump, a valve controlling said bypass and having a projecting stem, a spring plunger in line with said stem and having a shoulder, a tripping shaft, a trigger loosely mounted thereon and engaging said shouldei, loosely interlocking teeth on the shaft and trigger, a tripping arm secured to the shaft, an emergency governor for tripping said arm, and means for tripping said trigger independently of said arm, comprising a rod adapted to engage with said trigger.

10. The combination with an internal combustion engine having a fuel pump, of a bya detent for holdy the action of said spring, a

pass around said pump, a valve controlling said bypass and having a projecting stem, a spring plunger in line with said stem and having a shoulder, a tripping shaft, a trigger loosely mounted thereon and engaging with said shoulder, a bent. lever engaging with the plunger, a rod for actuating said lever to reset the plunger and trigger and also for tripping the trigger by hand, and an emergency governor operatively connected wih said tripping shaft.

11. rIhe combination with an internal com-` bustion engine having a fuel pump, means for-injecting fuel into the engine, and a conduit connecting the delivery side of the pump to said means, of two check valves arranged in series in said conduit, and a bypass communicating with said conduit at a point between said check valves.

12. The combination of an internal combustion engine, a fuel pump therefor, means forming a by-pass connecting the discharge side of the pump to a region of lower pressure, a valve controlling said by-pass, a spring for normally holding said valve closed, means for opening the valve against trigger for holding said last named means in inoperative position, and an emergency governor driven by the engine for tripping said trigger.

13. The combination of an internal combustion engine, a fuel pump therefor having a plurality of discharge valves arranged in series, means forming a by-pass which eX- tends from between said valves to a region of lower pressure, a normally closed valve for controlling said by-pass, detent controlling means for effecting the opening of said last named valve, means for tripping said detent, and means for resetting the valve and detent.

ln witness whereof, l have hereunto set my hand this 22nd day of July, 1914.

WlLLlAM EVERETT VER PLANCK..

Witnesses:

O'r'ro F. PEnssoN, O. T. FOUCHE. 

